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46、
By selling special coffee at a coffee cafe, the students are________
A．gaining a lot of experience
B．making a lot of money
C．having a lot of trouble
D．learning a lot of knowledge


47、
The best title for the passage could be________
A．Earning Money
B．Students' Life
C．Little Business
D．Kids' Cafe

48、回答48-67题
Many people are wondering if it is safe to talk on the phone while driving．There have been quite a few accidents while drivers were talking on the phone．Some research is being done to find out if driving while talking on the phone is dangerous．When there is a car accident police officers will find out if any of the drivers were using a cell phone．They will write this information in a report．The information will be saved and later studied．There have been some very bad car accidents caused by drivers being distracted by cell phones．Drivers sometimes forget to watch the road carefully when they are using their phones．Not paying attention to the road can be dangerous, even deadly．It is important for drivers to focus on the road．They need to pay attention to what is going on　around them．They might need to stop or swerve quickly．People want to make sure that the roads are safe for everyone．Studies will be done using the　information police officers collect at accidents．Maybe someday this information will lead to laws about driving and using cell phones．

While driving, drivers must keep an eye on what is happening________
A．in other cars
B．on the phone
C．around them
D．at home


49、Driving and talking on the phone at the same time could be________, research says．
A．difficult
B．dangerous
C．illegal
D．fun


50、 What will police officers do after a car accident? They will________
A．send the driver to the hospital
B．check how seriously the car is damaged
C．do the research on the car accident
D．find out if a cell phone is used


51、 The studies are based on________
A．the security people get on the road
B．the accidents caused by drivers
C．the law made for using cell phone
D．the information collected from the accidents

52、 回答52-71题
Never laugh at a snow covered mountain! Laughter and yelling, during the avalanche season, can cause a deadly pile of snow．Huge snow slides are most common in mountains where there are steep slopes that are well buried in snow and ice．The snow builds up slowly and lands very softly．This can create a very touchy, unstable situation．Tons of snow may be held up by only the friction between snowflakes．The deep snow is like a house of cards．The slightest movement can cause it to fall．As soon as something slips, this great mass of snow will come crashing down the mountainside．Slides may be started by sound vibrations．They may also be started by the weight of wet, melting snow．Once an avalanche has been triggered, the cause no longer matters．Moving down a steep slope, it picks up great speed and added snow．Some avalanches travel as fast as two hundred miles per hour．The force of an avalanche will mow down anything in its path．Whole houses have been swallowed up by these fast-paced piles of snow．The wind that is caused by an avalanche is almost as destructive as the snow itself．Winds from an avalanche have been known to travel as fast as those of a tornado．So, when approaching a thickly snow covered mountain, speak softly!

Avalanches can be started by________
A．falling snow
B．the wind
C．loud sounds
D．friction between snowflakes


53、 We can conclude from this passage that avalanches________
A．are common everywhere
B．are not very common
C．have killed people
D．are a thing of the past


54、
The writer compares an avalanche to________
A．a tornado
B．a falling house of cards
C．a snowstorm
D．a speeding train


55、
In this passage "unstable" means________
A．frightening
B．fast
C．shaky
D．undesirable

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